There is a chemical reaction which hardens the clay. This process is called bisque firing
I only know 2 so.. Wheat, and Millet
An example is in brick-making. Pliable clay is formed into brick-shape, and put into a kiln. When the brick is removed from the kiln, it is a solid brick.
You put clay in the kiln when the clay is at the bone dry stage.
Clay is fired in a kiln.
Firing clay is when a clay is fired in a kiln, this is to make the clay stay strong.
As long as the clay has not been fired in the kiln, it can be recycled.
An example is in brick-making. Pliable clay is formed into brick-shape, and put into a kiln. When the brick is removed from the kiln, it is a solid brick.
You put clay in the kiln when the clay is at the bone dry stage.
Mostly clay is placed in a kiln.
kiln
Clay is fired in a kiln.
I used the kiln to finish the clay project.
Firing clay is when a clay is fired in a kiln, this is to make the clay stay strong.
if you are referring to ceramics then what happens in a kiln is the ceramic clay you put in gets fired up to 1000 degrees Celsius. it then come out hard. it is the same process with when you glaze fired ceramic objects but they are put up to 1100 degrees Celsius there.
Kiln
As long as the clay has not been fired in the kiln, it can be recycled.
clay heated in a kiln really hot
saggar